It seems that the actual answer to this question is "It's up to you". However I often read in tex.SE some comments that oppose the usage of certain fonts, in somehow an absolute character. That suggests that some fonts are widely used, while some others, frown upon (depending on the situation, of course).

I don't mean some fonts are uglier than others, but there are presumably situations in which their use is inappropriate. I'd like to see suggestions of the community for: